(19)
(11) EP 1 707 373 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.11.2007 Bulletin 2007/48

(43) Date of publication A2:
04.10.2006 Bulletin 2006/40

(21) Application number: 06251689.3

(22) Date of filing: 28.03.2006
(51) International Patent Classification (IPC): 
B41J 2/165(2006.01)
 B41J 2/125(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 28.03.2005 JP 2005092309

(71) Applicant: Seiko Epson Corporation
Shinjuku-ku Tokyo 163-0811 (JP)

(72) Inventor:
  • Nishihara, Yuichi, Seiko Epson Corporation
    Shiojiri-shi, Nagano-Ken 399-0785 (JP)

(74) Representative: Cloughley, Peter Andrew et al
Miller Sturt Kenyon, 9 John Street
London WC1N 2ES
London WC1N 2ES (GB)

   


(54) Liquid ejection inspecting apparatus, printing apparatus, and liquid ejection system


(57) A liquid ejection inspecting apparatus includes (A) a sensing section (70), (B) a detection circuit (80), (C) a determination section, and (D) a substrate. The sensing section is arranged in a state of non-contact with a liquid ejection nozzle for ejecting a liquid. The detection circuit is for detecting an induced current generated in the sensing section due to the liquid ejected from the liquid ejection nozzle and charged electrically. The determination section is for determining whether or not the liquid is ejected from the liquid ejection nozzle normally, based on the induced current detected by the detection circuit. The substrate is provided with the sensing section and a circuit component that constitutes the detection circuit. The sensing section is provided on one surface of the substrate. The circuit component that constitutes the detection circuit is provided on the other surface of the substrate.







Search report